Changing Selected Volume

Hi, I have recently installed a SSD to run my OS in my mac and kept the original hard drive Volume 'Macintosh HD' for my apps and files.

Cleaner is only looking at Volumes/Macintosh HD/ when cleaning and I get multiple popups indicating items cannot be deleted because they are in use.

My question is, shouldn't Ccleaner be now looking at my SSD and if so I cannot find an option to tell Ccleaner to do so.

Thanks